Re: Import x from package

Stevan,

Thanks for the reply.  I was thinking more of roles, but now I see why this
would be very bad for classes.

I will take a look at the test.  I think that it is probably exactly what I
was thinking.

Best,

Chris

On Mon, Mar 31, 2008 at 2:27 PM, Stevan Little <
[email protected]> wrote:

> Christopher,
>
> For roles, there is currently no easy way to exclude attributes or their
> generated accessors, only true methods (generated accessors don't count
> because they are not created at the time when the role is consumed). It is a
> new feature, so there is not many docs on this yet, but there are some tests
> for it, look here http://
> search.cpan.org/src/STEVAN/Moose-0.40/t/030_roles/012_method_exclusion_in_composition.t
> for some examples.
>
> For classes, you don't want to do this, it is just plain bad OO practices.
> And to be honest, if you find that you are having this issues with Roles
> too, you probably want to break up your role into 2 smaller roles. Another
> programmer would expect that if you consumed RoleX or subclassed ClassX and
> those both had method foo_bar, that foo_bar would be there, by removing it
> you are setting yourself and others up for issues.
>
> - Stevan
>
>
> On Mar 31, 2008, at 4:00 PM, Christopher Brown wrote:
>
> > Stevan,
> >
> > I hope you and the rest of the Moose list is not getting sick of me.  I
> > am having a much fun with Moose and hope that I am contributing a smidge to
> > your efforts by kicking the tires and reporting my troubles.
> >
> > Here is something I got stuck on recently:
> >
> > Is there a way to import only one or several, but not all
> > atribute/method/symbol from a Moose role or class.  Sorta like the import
> > tags if you are using Exporter -or- like Python's import x from y.  Say I
> > want to extend a class but don't want all of it's methods.  What is the
> > Moose way?  I can, of course, undef unwanted symbols, like so:
> >
> > use feature 'say';
> > package Parent;
> > use Moose;         # awesome!
> >
> >    has 'attrib_1' => ( is => 'rw', isa=> 'Str', default => 'one' );
> >    has 'attrib_2' => ( is => 'rw', isa=> 'Str', default => 'two' );
> >
> > package Child;
> > use Moose;         # Even better!
> >    extends 'Parent';
> >
> >    undef &attrib_1;
> >
> > package main;
> >
> >    my $child = Child->new;
> >    say $child->attrib_2;
> >    say $child->attrib_1;
> >
> >
> > But there seems like there should be a better way.
> >
> > Any thoughts on this one.  ( Like all Moose things, I am sure it is
> > simple and straight-forward. )
> >
> > Thanks in Advance,
> >
> > Chris
> >
> >
>